Circuit-breaker.



- I. H. MILLSPAUGH.

CiRCUlT BREAKER.

APPLICATION FILED SEPT-10. 1911.

Patented Aug. 20, 1913 JAMES H. MILLSPAUGH, 01E GUTHBIE, OKLAHOMA.

CIRCUIT-BREAKER.

Specification of Letters Patent.

Patented Aug. 2%, 1918.

Application filed September 10, 1917. Serial No. 190,589.

To all whom it may concern:

Be it known that I, JAMES H. Minis PAUGH, a citizen of the UnitedStates, esiding at Guthrie, in the county of Logan and State ofOklahoma, have invented cor tain new and useful Improvements inCircuit-Brez'ikers, specification, reference being had totheaccompanying drawings.

This invention relates to certain improvements in circuit breakers andhas relation more particularly to a device of this general characterwhich is automatically operated through the medium of an electromagnet,and it is an object of the invention to proride a novel and improveddevice of this general character wherein the armature coacting with theelectromagnet serves as one of the contact members and wherein thesecond contact member is provided with means whereby interference wit-hthe operation of the closer by the accumulation of dust or other foreignsubstances is prevented.

The invention consists in the details of construction and in thecombination and arrangement of the several parts of my improved circuitbreaker wherein certain important advantages are attained and the devicerendered simpler, less expensive and otherwise more convenient andadvantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitelyclaimed.

In order that my invention may be better understood I will now proceedto describe the same with reference to the accompanying drawingswherein:

Figure l is a view. partly in elevation and partly in sectionillustrating a circuit closer constructed in accordance with anembodiment of my invention and in applied position;

Fig. 2 is a fragmentary view in rear elevation of one of the contactmembers as herein employed;

Fig. 3 is a fragmentary view in front elevation of the contact memberillustrated in Fig. 9;

Fig. 4 is a fragmentary view in side elevation of a contact memberconstructed in accordance with a modification of my invention;

Fig. 5 is a fragmentary view in front eleof which the following is avation of the form of contact member illustrated in Fig. 4; and

Fig. 6 is a fragmentary view in front elevation of a contact memberconstructed in accordance with a further modification of my invention.

As illustrated in the accompanying drawings H denotes a housing havingmounted therein an electromagnet E in communication with a suitablesource of electricity through the medium of a conductor a. Goacting withthe electromagnet E is a spring armature A suitably anchored, as at l toa wall of the casing and having secured to its opposite or free endportion the hammer 2 adapted to strike the bell B supported by thehousing H and arranged therebelow. Disposed transversely of the springarmature A adjacent its free end are the transversely disposed contactstrips 3 and at and coacting in a conventional manner with the strip 4is the free end portion of the spring contact member M suitably secured,as at 5 to a wall of. the housing H and in con1munication with theelectrical source through the medium of the conductor 7).

The free end portion of the member M is provided with the longitudinallydisposed slits 6, the inner end portions of which are enlarged, as at 7.

Secured to the opposite longitudinal marginal portions of the member Mare the elongated resilient strips 8 of metal or other suitableelectrical conducting material and each of said strips partiallyoverlies an ad jacent enlarged portion 7 of the slits 6. The free endportion of the strip 8 overlying an enlarged portion 7 is twisted as at9 so that the free end portion of said strip has its fiat facessubstantially at right angles to the flat faces of the opposite endportion of the strip 8. The portion 9 of the strip extends through theenlarged portion 7 and is provided adjacent its free end with the transversely disposed contact strip 10 which is adapted to engage the secondor inner transverse contact strip 3 carried by the spring armature A. Byhaving the portion 9 of each of the strips 8 arranged as hereinbeforedescribed it will be at once self evident that an edge of the stripcarried by the member M will contact with the spring armature A and bythis arrangement it will be at once self evident that no obstructionwill be of.

fit"

fered by dust or other 'tca'eign substance to the proper coactionbetween the portions 9 oi each the springs S and the spring armature A.This in practice has proven of material advantage,

in the form of invention particularly illustrated in Figs. 4tand thecontact me iber 1i has its contacting or free end por tion provided withthe elongated slits ll affording fingers 12 and the tree end-per tionsof said lingers are twisted as indicated at 1% to an angle ofsubstantially 90 whereby the same advantageous result is afforded asproduced by the portions 9 of the strips 8 hereinbeit ore referred to.

in the form of invention illustrated in rig. o ic conn memoei in nas itscong or free end portion provided with. the litlfill also afford meanswhere t I whic i by tne efficiency of the member M is not imcust orother foreign substances. From the foregoing description, it is thoughtto be obvious that a circuit breaker constructed in accordance with myinvention particularly well adapted for use by reason oi the convenienceand 'i'acilitv with which it may be assembled and operaed and it willalso be obvious that n v invention is sceptihle of some change andmodification illlOHil inatei'iallv departing from the principle andspirit thereof and for this reason I do not wish to be understood aslimiting inyseiii to the precise arrangement and formation of theseveral parts herein shown in caz'i'yir out my invention in practicee3:- copt as hereinafter claimed.

1 claim:

1. A circuit closer comprising two relatively movable members one ofsaid mem bers comprising spacer. strips having their contactin endstwisted whereby the edges oi said strips en the second member.

A. circuit closer comprising two relatively movable members one of saidmem bers being provided with an opening there through, a strip securedto said last named member and having an end portion disposed edgewisethrough said opening for contact with the second member.

in testimony whereof I hereunto afiiz; my signature in the presence oftwo witnesses.

each, by addressing Gomniissioner of Pet won 1 1'.

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